Square wave generator circuit

Abstract

The invention discloses a square wave generator circuit which comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a comparator and a first capacitor. The first resistor is connected with the power supply voltage source and the in-phase input end of the comparator; the second resistor is connected with the first resistor; the third resistor is connected with the first resistor and the fourth resistor; the fourth resistor is connected with the first resistor and the fifth resistor, and the fifth resistor is connected with the inverted input end of the comparator; the sixth resistor is connected with the first resistor and the output end of the comparator; the first diode is connected with the third resistor and the output end of the comparator; the first capacitor is connected with the fifth resistor; and the voltage input end of the comparator is connected with a power supply voltage source, and the logic grounding end and the output grounding end of the comparator are grounded. The requirement for generating square waves with higher frequency can be met, the structure is simple, and a complex digital circuit does not need to be configured.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a square wave generator circuit. Background technique [0002] There are three main types of conventional square wave generator circuits: the first type is generated by analog circuits. It mainly uses operational amplifiers as the core, cooperates with resistors, capacitors, and even inductors or transformers to generate square waves through multivibrator or self-excited oscillation. The second category is generated using digital circuits. Mainly use a single-chip microcomputer or other digital signal processing circuits, cooperate with necessary regulated power supply voltage sources, crystal oscillators and other peripheral circuits, and generate square waves through digital frequency division and other methods. The third type is generated by using analog-digital hybrid circuits such as 555 timers. This type of timer circuit is mainly set to a multivibrator worki...

AI Technical Summary

Problems solved by technology

The frequency of the square wave obtained by the first method above generally does not exceed 50KHz, and the frequency of the square wave is too low to meet the application scenarios that require high-frequency square waves

The second type of method needs to set a specific power supply voltage and digital signal processing circuit, the circuit structure is complex, and the cost is high

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